Replace static showcase layout with interactive demo grid featuring 4 real example cases (complex formulas, distorted text, handwriting, text layout). Add demo image loading via sessionStorage when users click "Try it now". New CSS grid with hover effects, overlay buttons, and responsive design. Update testimonials with new user feedback.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
- Fix broken hreflang: /en/ ghost page removed, all hreflang point to canonical /
- Add canonical URL tag
- Remove emoji from page titles
- Rewrite title/description with target keywords (LaTeX OCR, math formula recognition, handwriting math)
- Add JSON-LD WebApplication structured data schema
- Update og:image to clean URL without OSS params, add og:image dimensions
- Fix favicon reference from vite.svg to favicon.png
- Add public/sitemap.xml with hreflang annotations
- Add public/robots.txt pointing to sitemap
- Update seoHelper.ts keywords for both zh/en to match search intent
- Add CLAUDE.md project documentation
